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Kingston, Jamaica's capital and largest city, occupies a distinctive geographic position on the southeastern coast of the island, nestled between the Blue Mountains to the north and the Caribbean Sea to the south. This coastal urban centre sits at a low elevation, averaging just 9 metres above sea level, with its urban core concentrated around the natural harbour of Kingston Harbour—the seventh-largest natural harbour in the world. The city's geography creates a unique air quality dynamic: the surrounding mountains act as a partial barrier to northeasterly trade winds, while the sea moderates temperatures but contributes to humidity. Kingston's urban character is densely populated, with significant vehicular traffic, port activities, and general urban emissions concentrated in the Liguanea Plain. The urban–rural gradient shows decreasing pollution levels as one moves toward the mountainous interior or less developed coastal areas. Proximity to agricultural zones in St. Catherine parish to the west can occasionally bring biomass burning influences, while the harbour's industrial belt contributes localized emissions. The city's coastal location typically facilitates some pollutant dispersion, but topographic features can create microclimates where pollutants accumulate, particularly during periods of atmospheric stability.

Kingston experiences a tropical marine climate with distinct wet and dry seasons that shape its air quality patterns throughout the year. During the dry season from December to April, reduced rainfall and persistent northeasterly trade winds generally maintain good air quality, making these months favourable for outdoor activities. However, occasional Saharan dust events can elevate particulate levels, particularly in March and April. The rainy season from May to November brings increased humidity and precipitation that helps cleanse the atmosphere, though tropical storms and hurricanes from June to November can temporarily disrupt normal pollution patterns. Peak pollution typically occurs during transitional months when rainfall decreases but before consistent trade winds re-establish, sometimes leading to accumulation of urban emissions. Sensitive groups including those with respiratory conditions should monitor air quality reports during periods of reduced wind or when Saharan dust advisories are issued. The city's coastal location prevents extreme temperature inversions common in mountainous regions, but occasional calm conditions combined with urban heat island effects can create localized pollution pockets. Health guidance emphasizes staying hydrated and limiting strenuous outdoor activities during peak heat hours when ozone formation may be enhanced.